mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-04 00:48:58 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

Issue #18844: Add more tests

Browse source
This commit is contained in:
Raymond Hettinger 2016-10-14 01:19:38 -04:00
parent a0ef768ddf
commit 7b16652f1c
1 changed files with 14 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

14
Lib/test/test_random.py
View file

@ -205,6 +205,20 @@ class TestBasicOps:
]:
self.assertTrue(set(choices(data, cum_weights=weights, k=5)) <= set(data))
# Test weight focused on a single element of the population
self.assertEqual(choices('abcd', [1, 0, 0, 0]), ['a'])
self.assertEqual(choices('abcd', [0, 1, 0, 0]), ['b'])
self.assertEqual(choices('abcd', [0, 0, 1, 0]), ['c'])
self.assertEqual(choices('abcd', [0, 0, 0, 1]), ['d'])
# Test consistency with random.choice() for empty population
with self.assertRaises(IndexError):
choices([], k=1)
with self.assertRaises(IndexError):
choices([], weights=[], k=1)
with self.assertRaises(IndexError):
choices([], cum_weights=[], k=5)
def test_gauss(self):
# Ensure that the seed() method initializes all the hidden state. In
# particular, through 2.2.1 it failed to reset a piece of state used